Spring 2012 Seminars

Date

Presenter

Description

January 26, 2012

Muhammad Mubeen Masud and Bilal Ijaz, ECE Graduate Students

Title: A Compact Tunable Dual Band Metasurface for EMI Shielding ApplicationsAbstract: In this project, a compact tunable metasurface for dual-band electromagnetic interference (EMI) shielding has been proposed and is implemented. A prototype of the metasurface consisting of printed Jerusalem crosses has been designed and demonstrated EMI shielding for the frequency bands of 900 MHz, and 1.8 GHz. The simulated results were successfully validated with measurements in an anechoic chamber. It has been shown that the EMI shield can block both bands of interest to prevent the exposure of sensitive electrical and electronics equipment from malfunctioning from possible external interference.Speakers bios:Muhammad Mubeen Masud -- received his BS in Electrical Engineering Degree from University of Engineering & Technology, Lahore, Pakistan in the year 2004. He completed his Masters in Electrical Engineering from Royal Institute of Technology (KTH), Stockholm, Sweden in 2008, where he majored in Wireless Systems. Currently he is pursuing his PhD in Department of Electrical and Computer Engineering at North Dakota State University, Fargo. His interests are electromagnetics, microwave engineering, antennas for RFID tags, wireless sensors and printed antennas in anisotropic environment.Bilal Ijaz -- received the M.Sc. degree in Modern Digital Communication Systems from the University of Sussex, United Kingdom, in 2008. He is currently pursuing the Ph.D. degree in electrical and computer engineering at North Dakota State University, Fargo. His current research interests include RF and microwave communications, frequency selective surfaces and electromagnetic compatibility.

January 31, 2012

Jonathan Tolstedt

Title: Intellectual Property and NDSU: a Love-Hate RelationshipAbstract: Not just another boring talk about patents, copyrights, and trademarks – the intent of this presentation is to address some of the myths and misconceptions about intellectual property at NDSU, its checkered history, its successes, its failures, its good points and its bad points, and – most importantly – some innovative ways we might consider for moving forward. This is meant to be an informal, frank, friendly, constructive, and interactive dialog.Speaker bio: Jonathan Tolstedt graduated from South Dakota State University (but don’t hold that against him) with a Bachelor of Science degree in Electrical Engineering and a Minor in Mathematics, and received his Master of Science in Computer Science from the University of Iowa. Jonathan worked in industry for 20+ years for Rockwell Collins and John Deere, first as a software/systems engineer and then as a business development specialist. In 2006, Jonathan passed the patent bar exam and became a registered US patent agent. By day, Jonathan is a Licensing Associate for the NDSU Technology Transfer Office and NDSU Research Foundation. He also has his own independent consulting business, through which he has written dozens of patent applications and represents several local start-up and technology companies and independent inventors. He is also an inventor himself and is listed on two pending patent applications. He teaches the Introduction to Computing class for the ECE department.

February 14, 2012

Hamed Sajjadi Kai, ECE Graduate Student

Title: Current-mode long-range linksAbstract: We propose a novel cost-effective long-range network-on-chip interconnect design based on current-mode signaling. The proposed CMOS based long-range link reduces the communication delay of long wires significantly without using traditional pipelined repeaters, making it a cost efficient alternative to wireless and optical interconnects. Spice simulations are performed to verify the performance of the proposed current-mode transceiver. The performance of the proposed interconnect is analyzed and compared with wireless, optical and existing CMOS based interconnects. Also a modified NoC simulator is utilized to demonstrate the benefit of current-mode long-range links.

March 27, 2012

Ivan T. Lima, Jr.

Title: Monte Carlo Method Applied to Electrical EngineeringAbstract: In this talk will be presented an introduction of the Monte Carlo method, along with advanced implementations of the Monte Carlo methods applied to electrical engineering problems in photonics. The advanced methods described in this talk include importance sampling and the multicanonical Monte Carlo method, with applications to practical engineering problems, including biomedical imaging and optical fiber communications. The methods presented here enabled the reduction of the computer time required in the numerical calculation with the Monte Carlo method from days to tens of minutes. These methods can also be exploited to address other stochastic problems without analytical solution, in which the desired random parameter is a complex function of a random vector with known probability model.Speaker bio: Ivan T. Lima Jr. received the B.Sc. degree in Electrical Engineering (Electronics) from the Federal University of Bahia (UFBA), Salvador, Brazil, in 1995, the M.Sc. degree in Electrical Engineering (Electromagnetics) from the University of Campinas (UNICAMP), Campinas, Brazil, in 1998, and the Ph.D. degree in Electrical Engineering (Photonics) from the University of Maryland, Baltimore County, USA, in 2003. In 2003, Dr. Lima became a faculty member in the Department of Electrical and Computer Engineering at North Dakota State University, Fargo, ND, USA, where he is currently an Associate Professor with tenure. http://venus.ece.ndsu.nodak.edu/~limajr

March 28, 2012

Sayantica Pattanayak, ECE Graduate Student

Title: An anonymous health care systemAbstract: As medical records are converted to electronic format, risks of patients privacy increases dramatically. We look at parties such as insurance agents that are not actively involved in patient care. Currently patients who are insured are required to share the entire medical records with the insurer. The recent cryptographic developments can allow verifications without revealing any additional information about the patient's record.

April 24, 2012

Professor Rustav Baratov, Guest of David Rogers

Title: Uzbekistan – It's history, culture and traditionAbstract: The main goal of presentation is to give American people more information about Uzbekistan, it`s long and old history, various culture and tradition. This is serving to increase mutual understanding between the people of the USA and the people of the Uzbekistan.

April 24, 2012

Eshita Ahmed, ECE Graduate Student

Title: Hybrid Renewable Energy System Using DFIG and Multilevel InverterAbstract: The rotor of a doubly fed induction generator (DFIG) driven by a wind turbine needs rotor excitation so the stator can supply a load or feed the grid. In a variable-speed wind energy conversion system (WECS), the mechanical frequency of the generator varies, and in order to keep the stator voltage and frequency constant, the rotor voltage and its frequency have to be varied. Thus the system requires a power conversion unit to supply the rotor with a variable frequency voltage that keeps the stator frequency constant irrespective of the wind speed. In the scheme proposed, the rotor of the DFIG draws power either from three-phase ac mains or from a set of photo voltaic (PV) panels depending on the availability of the solar power. Maximum power point tracking techniques have been used for power extraction from both the wind turbine and solar panels. A multi-level inverter is used to convert the rectified voltage from ac mains and dc voltage from PV panels to a variable-frequency voltage to supply the rotor.